. >> reporter: though the amish typically shy away from modern technology, sarah hershberger's father agreed to do a phone interview. her parents initially agreed to chemo. after a month, the tumors shrunk. but the side effects became too much for her to handle. >> if we do chemotherapy and she would happen to die, she would probably suffer more than if we would do it this way. and she would happen to die. >> reporter: so, in june, they stopped the treatment. with chemotherapy, her doctors say she has an 85% chance of survival. without it, she could die within a year. in july, the hospital took the family to court, seeking temporary guardianship. in a statement to abc news, the hospital attorney, lobbying to take over sarah's care says, i believe there can be no doubt that it is in her best interest to have chemotherapy and have a chance to live a full life. >> the state's interest in protecting the child's life is going to be considered compelling. and at the end of the day, i think that it's going to override the parents' rights. >> reporter: for "good morning america," alex perez,